s390: remove 31 bit support

Remove the 31 bit support in order to reduce maintenance cost and
effectively remove dead code. Since a couple of years there is no
distribution left that comes with a 31 bit kernel.

The 31 bit kernel also has been broken since more than a year before
anybody noticed. In addition I added a removal warning to the kernel
shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning
message") which let everybody know about the plan to remove 31 bit
code. We didn't get any response.

Given that the last 31 bit only machine was introduced in 1999 let's
remove the code.
Anybody with 31 bit user space code can still use the compat mode.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c
index 5c586c78ca8d..1eb41bb3010c 100644
--- a/arch/s390/mm/gup.c
+++ b/arch/s390/mm/gup.c
@@ -106,11 +106,9 @@ static inline int gup_pmd_range(pud_t *pudp, pud_t pud, unsigned long addr,
         pmd_t *pmdp, pmd;
 
         pmdp = (pmd_t *) pudp;
-#ifdef CONFIG_64BIT
         if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
                 pmdp = (pmd_t *) pud_deref(pud);
         pmdp += pmd_index(addr);
-#endif
         do {
                 pmd = *pmdp;
                 barrier();
@@ -145,11 +143,9 @@ static inline int gup_pud_range(pgd_t *pgdp, pgd_t pgd, unsigned long addr,
         pud_t *pudp, pud;
 
         pudp = (pud_t *) pgdp;
-#ifdef CONFIG_64BIT
         if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2)
                 pudp = (pud_t *) pgd_deref(pgd);
         pudp += pud_index(addr);
-#endif
         do {
                 pud = *pudp;
                 barrier();